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A kind of leveling method of semi-technical steel

A semi-process and flattening technology, applied in the direction of metal rolling, contour control, etc., can solve the problems of low efficiency and effective control of defect elimination, and achieve the effect of reducing edge wave defects, reducing elongation, and reducing operation difficulty

Active Publication Date: 2020-12-18
FOSHAN POLYTECHNIC
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Problems solved by technology

However, this method only focuses on the changes brought about by the tempering machine, without effective control from the previous process, and its efficiency in eliminating defects is low

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  • A kind of leveling method of semi-technical steel

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below.

[0029] The invention provides a method for smoothing semi-technical steel, comprising:

[0030] (1) hot-rolling the thin plate on a hot rolling mill to obtain a hot-rolled steel plate;

[0031] Wherein, hot rolling is carried out by using a 7-stand hot continuous rolling mill; preferably, the tension between each stand is: the first stand and the second stand are 2-3N / mm 2 , the second frame and the third frame are 4-5N / mm 2 , the third frame and the fourth frame are 6-7N / mm 2 , the fourth frame and the fifth frame are 7-8N / mm 2 , the fifth frame and the sixth frame are 10-11N / mm 2 , the sixth frame and the seventh frame are 12-13N / mm 2 The reduction rate of the first frame is 52-55%, the reduction rate of the second frame is 50-52%, the reduction rate of the third frame is 45-48%, and the reduction rate...

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Abstract

The invention discloses a method for leveling semi-processed steel. The method comprises the following steps of hot continuous rolling, acid pickling, cold rolling, annealing, secondary cold rolling and withdrawal and straightening, wherein in the secondary cold rolling process, the convexity of the roller surface of a temper mill is 5-10 micron, and the ratio of the rolling force to the temper mill tension force is 20-30 to 1. According to the method, by adding the tension and straightening process, the elongation of the semi-process steel in the leveling process is reduced, the operation difficulty in the leveling process is reduced, and the occurrence probability of the edge wave defect is greatly reduced; and meanwhile, by adjusting corresponding parameters in the hot rolling process,the occurrence probability of the medium wave is reduced.

Description

technical field [0001] The invention relates to the field of electrical steel production, in particular to a leveling method for semi-process electrical steel. Background technique [0002] Semi-finished electrical steel is also called semi-finished electrical steel. Compared with full-process electrical steel, there are fewer processes and a shorter process. The use of semi-finished electrical steel as the core of small and medium-sized motors has relatively high energy utilization efficiency; in developed countries and regions such as Europe and the United States, Semi-process non-oriented electrical steel is widely used. Semi-process steel has strong advantages in energy saving and environmental protection, and it is also increasingly valued in my country. [0003] Semi-process electrical steel needs to be cold-rolled twice after annealing. During this process, the hardening of work hardness is difficult to avoid. After slitting and slitting, "C-type" bending is prone to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/22B21B37/28B21B37/30B21B37/38
CPCB21B1/222B21B37/28B21B37/30B21B37/38B21B2263/04B21B2263/06B21B2263/08
Inventor 周峰周庆唐顺陈建平
Owner FOSHAN POLYTECHNIC
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